FrostCal

When to Plant Watermelon in Connecticut

In a typical Connecticut location, start seeds indoors Mar 21 – Mar 28, then transplant outdoors May 2 – May 9. Across the state, the outdoor planting window starts as early as Apr 19 in Bridgeport and as late as May 22 in Torrington.

Method Start indoors, then transplant
Days to maturity 70–90 days

Needs warm soil (65F+); start indoors 3-4 weeks before last frost, transplant 2-3 weeks after last frost.

Watermelon Planting Dates by City

CityStart indoorsTransplant
BridgeportMar 8 – Mar 15Apr 19 – Apr 26
New HavenMar 20 – Mar 27May 1 – May 8
StamfordMar 20 – Mar 27May 1 – May 8
North StamfordMar 20 – Mar 27May 1 – May 8
HartfordMar 20 – Mar 27May 1 – May 8
WaterburyMar 29 – Apr 5May 10 – May 17
NorwalkMar 20 – Mar 27May 1 – May 8
DanburyMar 23 – Mar 30May 4 – May 11
East NorwalkMar 20 – Mar 27May 1 – May 8
New BritainMar 20 – Mar 27May 1 – May 8
West HartfordMar 20 – Mar 27May 1 – May 8
BristolMar 28 – Apr 4May 9 – May 16
MeridenMar 29 – Apr 5May 10 – May 17
HamdenMar 21 – Mar 28May 2 – May 9
FairfieldMar 8 – Mar 15Apr 19 – Apr 26
West HavenMar 20 – Mar 27May 1 – May 8
MilfordMar 8 – Mar 15Apr 19 – Apr 26
StratfordMar 8 – Mar 15Apr 19 – Apr 26
City of Milford (balance)Mar 8 – Mar 15Apr 19 – Apr 26
East HartfordMar 20 – Mar 27May 1 – May 8
MiddletownMar 29 – Apr 5May 10 – May 17
EnfieldMar 24 – Mar 31May 5 – May 12
SouthingtonMar 29 – Apr 5May 10 – May 17
SheltonMar 28 – Apr 4May 9 – May 16
NorwichMar 17 – Mar 24Apr 28 – May 5
TrumbullMar 8 – Mar 15Apr 19 – Apr 26
West TorringtonApr 10 – Apr 17May 22 – May 29
TorringtonApr 10 – Apr 17May 22 – May 29
GlastonburyMar 20 – Mar 27May 1 – May 8
NaugatuckMar 21 – Mar 28May 2 – May 9

Showing the 30 most populous of 86 Connecticut cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Connecticut cities.

Frequently Asked Questions

When should I plant watermelon in Connecticut?

In a typical Connecticut location, start seeds indoors Mar 21 – Mar 28, then transplant outdoors May 2 – May 9. Across the state, the outdoor planting window starts as early as Apr 19 in Bridgeport and as late as May 22 in Torrington.

When is the last frost in Connecticut?

The average last spring frost in Connecticut ranges from April 5 in Bridgeport to May 8 in Torrington, based on NOAA 1991–2020 climate normals.

How long do watermelon take to grow?

Watermelon typically take 70–90 days from planting to harvest. Needs warm soil (65F+); start indoors 3-4 weeks before last frost, transplant 2-3 weeks after last frost.

Other Crops in Connecticut

When to plant watermelon in other states

Related Guides